This research aims to learn and analyze some photographs shot by Vincenzo Pastore in the early 20th century. These photographs analyze daily scenes of mainly children in public spaces, in the context of Sao Paulo's urban reformation and population growth between 1900 and 1910. Therefore, the indicative feature of photographs made it possible to know children's presence in the public space. To achieve this goal, the analysis of Pastore's photographs was evaluated and executed in dialogue with a diversity of historical documents from the period: newspapers, legislative documents, postcards, and personal memories. Finally, this research concludes that the urban reforms of São Paulo at the beginning of the 20th century resulted in an unequal and segregated city. Regarding the children, these urban reforms meant their exclusion and lack of care in public spaces.